87 lines
2.7 KiB
C++
87 lines
2.7 KiB
C++
/* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef BUFFEREDFILEIO_INCLUDED
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#define BUFFEREDFILEIO_INCLUDED
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#include <my_global.h>
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#include <mysql/plugin.h>
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#include "i_keyring_io.h"
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#include "keyring.h"
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#include "logger.h"
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#include "keyring_memory.h"
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#include "buffer.h"
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#include "hash_to_buffer_serializer.h"
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#include "keyring_stat.h"
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#include "file_io.h"
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namespace keyring {
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class Buffered_file_io : public IKeyring_io
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{
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public:
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Buffered_file_io(ILogger *logger)
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: eofTAG("EOF")
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, file_version("Keyring file version:1.0")
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, logger(logger)
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, backup_exists(FALSE)
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, memory_needed_for_buffer(0)
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, file_io(logger)
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, keyring_file(-1)
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{
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}
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my_bool init(std::string *keyring_filename);
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my_bool flush_to_backup(ISerialized_object *serialized_object);
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my_bool flush_to_storage(ISerialized_object *serialized_object);
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ISerializer* get_serializer();
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my_bool get_serialized_object(ISerialized_object **serialized_object);
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my_bool has_next_serialized_object();
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protected:
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virtual my_bool remove_backup(myf myFlags);
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virtual my_bool read_keyring_stat(File file);
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virtual my_bool check_keyring_file_stat(File file);
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private:
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my_bool recreate_keyring_from_backup_if_backup_exists();
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std::string* get_backup_filename();
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my_bool open_backup_file(File *backup_file);
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my_bool load_file_into_buffer(File file, Buffer *buffer);
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my_bool flush_buffer_to_storage(Buffer *buffer, File file);
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my_bool flush_buffer_to_file(Buffer *buffer, File file);
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inline my_bool check_file_structure(File file, size_t file_size);
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my_bool check_if_keyring_file_can_be_opened_or_created();
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my_bool is_file_tag_correct(File file);
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my_bool is_file_version_correct(File file);
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Keyring_stat saved_keyring_stat;
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std::string keyring_filename;
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std::string backup_filename;
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const std::string eofTAG;
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const std::string file_version;
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ILogger *logger;
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my_bool backup_exists;
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Hash_to_buffer_serializer hash_to_buffer_serializer;
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size_t memory_needed_for_buffer;
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File_io file_io;
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File keyring_file;
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};
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}//namespace keyring
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#endif //BUFFEREDFILEIO_INCLUDED
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